Top plate air deflector for pot burners



June 3, 1958 c. B. RICHARDSON 2,837,149

- TOP PLATE AIR DEF'LECTOR FOR POT BURNERS Filed March 24, 1955 26 3 i7I 7 12-, I I. 1 1 f V l f 2 T'WlqllIlllllllrnlvlll|vlll|xl r%fi 2 2 ,4 mo o o a o 1 United States Patent Z,837,l49 Patented June 3, 1958 Iass/1,149 I TOPVPLATE AIR DEFLECTOR FOR POT BURNERS can B. Richardson,Norfolk, Va.

Application March 24, 1953, Serial No. 344,353

1' Claim. (Cl. 158- 91) This invention relates generally to the class offuel oil burners and is-directed particularly to improvements in pottype burners.

An object of the present invention is to provide an oil burner of thepot type having a novel head or top construction designed ,to effect aprescribed movement of air into the flame opening of the burnerstructure whereby the rising fuel vapors will be more or. lessconcentrated in the central part of the pot and thoroughly mixed withthe combustion air to effect as nearly a perfect combustion or burningof the fuel as is possible.

Another object of the invention is to provide inan oil burner of the pottype, .a novel air control or air defleeting means associated with thetop or head of the burner structure whereby the maximum heating eflectwill be obtained from the fuel introduced with substantially completeelimination of carbon formation and, consequently, of smoking after theburner reaches the proper or desired operating temperature.

'A further and more specific object of the invention is to provide in afuel oil burner of the pot type, a top air deflecting plate having acentral opening definedat its underside or underedge by a downwardlyinclined lip by means of which inflowing air is deflected downwardly andinwardly toward the axial center of the pot instead of flowing directlyradially inward as in the usual type of construction.

The invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawing forming a part of the specification, with the understanding,however, that the invention is not to be limited to the exact details ofconstruction shown and described since obvious modifications will occurto a person skilled in the art.

In the drawing: 7

Figure 1 is a vertical central section through a fuel oil burner of thepot type constructed in accordance with the present invention showingthe present improved top or air deflecting plate.

Figure 2 is a sectional view taken substantially on the line 22 ofFigure 1 looking upwardly toward the underside of the air deflectingplate.

Figure 3 illustrates on an enlarged scale the detailed sectionof the airdeflecting lip as shown in Figure 1.

Figure 4 illustrates on an enlarged scale a slight modification of theair deflecting lip form.

Referring now more particularly to the drawing the numeral generallydesignates an air housing in which a static air pressure is maintainedin accordance with customary practice, the air being supplied from asuitable source such as an air pump or the like, not shown, through thepipe or conduit 11 which opens through the side wall of the housing 10as illustrated.

The pot burner unit constructed in accordance with the present inventionis generally designated 12. This burner comprises the bottom pan orreceptacle 13 which, in accordance with the present invention, has abottom wall 14 and a low side wall 15 formed of thick or heavy cast ironor steel. Forming a continuation of the low thick or heavy wall 15 isthe thinner circular wall 16 which is formed of-light weight sheet steeland which encircles the top edge of the low wall 15 and is securedthereto in a suitable manner as, for example, by the use of screws 17 orthe like.

The wall16 is provided with numerous air admission apertures 18 wherebyair may enter from the housing 10, the overall diameter of the wall 16being materially less than the inside diameter of the housing 10 asshown whereby space is provided around the pot for free movement of air.

The top of the pot is closed by the'head plate 19 which is provided withthe depending annular flange 20 which 'fits within the wall 16, togwhichit is secured in a suitable manner by the employment of screws 21 or thelike. The head plate 19 is provided with the central opening22 throughwhich the flame of the burning gases discharge.

Overlying the head plate 19 is the air deflector plate 23. Thisdeflector plate'is of an overall diameter approximately equalling theinside diameter of the housing 10 so that it forms, a horizontalpartition in the housing above the pot burner and it is secured in placeby means of the long bolts 24 which pass down through the defiectorplate, between the wall of the housing 10' and the wall of the potburner to be secured in the bottom of the housing as illustrated. Inaddition the shorter bolts 25 are employed for directly coupling thedeflector plate 23 with the head plate 19.

The deflector plate 23 is maintained in spaced relation with the top ofthe'plate 19 by the annular series of spacers downwardly directed ordepending lugs 26 which rest upon the top of the head plate 19 and forma circle having an inside diameter approximately the same as thediameter of the opening 22. The deflector plate 23 has the centralopening 27 which is of slightly smaller diameter than the opening 22 inthe head plate 19, as shown in Figure 1. I

As shown in detail in Figure 3 the top edge of this opening is roundedslightly as indicated at 28 and the opening is defined on the undersideof the plate by the depending lower edge lip 29 which has the twodownwardly converging faces 30 and 31.

As is clearly illustrated in Figure 3 the outer one of the twoconverging faces, which is indicated by the numeral 30, extends from theplane of the under face of the plate 23 or from the tops of the spacerlugs 26.

The inner sloping face 31 also starts from the plane of the under faceof the plate 23 and slopes downwardly and outwardly to intersect theface 30.

The top surface of the bottom 14 of the pan 13 has at the center thereofthe upstanding mound 32 through the axial center of which is formed thefuel inlet port 33, with which is connected the fuel supply pipe 34.This mound has the downwardly and outwardly sloping top side surfacesdesignated a and b respectively which lead to the outwardly anddownwardly sloping top surface of the bottom 14 as shown.

On the top surface of the bottom wall 14 is formed an annulus 35 andwithin the annulus are concentric broken annuli 36 for the purpose setforth in the co-pending application Serial No. 344,351, filed March 24,1953.

The form or construction and operation of the lower part or pan sectionof the pot burner is described and claimed in the co-pending applicationreferred to and accordingly a detailed description of such constructionand operation is not here set forth.

As is also set forth in the co-pending application the fuel oil supplypipe has a smooth or threaded rod 37 3 v therein, having opposite flatsides 38 whereby to permit oil to flow upwardly through the .port .33.and pipe .34 into the burner. This rod facilitates the volatilizationof the oil by conducting heat from the flame within the burner down.into the oil pipe :line thereby pre-heating the oil.

Figure 4'illustra'tes -a slightly modified form of the air deflectingplate and 'the deflecting lip at the edge of the centralopening'ther'eof. In this modified construction the plate is generallydesignated 23a and :is devoid :of the integral supporting lugs upon theunderface such as the lugs 26 shown in Figures 1 and 3. This modifiedplate construction employs a plurality of spacer sleeves 39 throughwhich the coupling bolts125a'pass.

The opening'in the plate .23a is designated MB-and is defined upon theunderside of'the plate by the de'pendin-g lip 20a which has the outerand inner downwardly converging faces 30a and 31a. The edge of the lip29a formed by the intersecting converging faces 30a and 31a is disposed.approximately above the edge of the opening 22 of the topplate 19 .asshown. i

It will be seen upon reference :to Figure 1 that in the operation of theburner some of theair within the casing it) enters through the side wallopenings 18 and some of the air passes inwardly between the plates 19and 23. This latter air strikes the downwardly :and inwardly inclineddeflecting face 30 -'of the .lip 29, causing the air to move downwardlyand inwardly in opp'ositionto the upwardly rising air from the burner,whichhas entered by way of the openings 18. Thus there will be .a:slight downwardly beating of the vaporized fuel causing it to mixthoroughly with the air within the pot, at ;the reenter of the latter sothat substantially complete combustion is effected and the :formationofcarbon is eliminated.

With the modified lip construction shown in .Figure 4 the samedeflection is given to the air entering between the plates.

By reason iof'the construction of the air defiector'plate herein .setforth the .efliciency of the burner as 'a'whole is improved to the"point where the burner may be rop- 4 erated with complete eliminationof smoke or carbon deposit.

I claim:

A fuel oil burner of the pot type comprising a combustion chamber havinga bottom wall, a sidewall and a top plate carried by the sidewall, thetop plate having a central flame opening, the sidewall having airadmission openings, a static air chamber enclosing the combustionchamber and having a sidewall surrounding and spaced from the combustionchamber sidewall, "an air deflector plate closing the upper end of :said;air chamber and overlying said top plate in spaced relation thereto,said air plate having a central opening conce'ntr ic with the top plateopening means comprising a plurality of spaced lugs depending from saidair plate and integral therewith and engaging the upper surface of saidtop plate to maintain the spacing between said top plate and air plateand a depending air deflecting lip on the under side of said air plate,said lip-having a .downwardly and inwardly inclined outer surface'fordeflecting 'infiowin'g air downwardly and inwardly toward the'a'xialcenter of the combustion chamber and a downwardly and outwardly inclinedinner surface on saidlip intersectingsa'id outer surface ito'form anannular edge, said annular edge defining a circle and disposed in aplane 'abovethe'plane of the top surface of said top plate, the'diameterof said top plate opening beingat least as great as the diamete of 'saidannular edge.

References Cited in-the fileof this-patent UNITED STATES PATENTS1,897,314 Little Feb. ,14, 19.33 2,214,420 Kessler et a1. Sept.110,.51940 2,250,045 Focke et a1 July .22, 1941, 2,286,497 Miceli et a1.June 16, 1942 2,357,454 Brown .Sept. .5, 1-944 2,373,910 Perry et al.Apr. 17,1945 2,404,039 Castle July 16, .1946.

2,468,156 Baity Apr. 26, 4949

